Hi, guys. I'm currently debating the value of treadmills on a health forum. It seems to me that once a treadmill is at speed, running on it will be (disregarding windfriction and an inability to turn, ever), basically the same mechanic as running over a flat "ground," with the same relative velocity. The guy I am discussing it with gave a lengthy discussion about overcoming friction, moments of inertia etc. But it seems to me that relative motion is relative motion, and that's basically that. Am I dumb?